body {
  overflow-y: hidden;
}

.preloader {
  position: fixed;
  width: 100%;
  height: 100%;
  background: #f7f7f7;
  z-index: 99999;
  display: flex;
  justify-content: center;
  align-items: center;
  opacity: 1;
  transition: 0.3s;
}

.preloader.hiding {
  opacity: 0;
}

.preloader.hidden {
  opacity: 0;
  display: none;
  visibility: hidden;
}

.preloader-logo {
  background-size: contain;
  width: 100px;
  height: 100px;
  float: left;
  display: block;
  background-image: url("../img/uust.svg");
  background-repeat: no-repeat;
  background-size: 100%;
  background-position: center;
  animation: preloader 2s infinite ease-in-out;
}

@keyframes preloader {
  50% {
    transform: scale(1.1);
  }

  100% {
    transform: scale(1);
  }
}